When we flush, Prozac, cocaine and antibiotics trickle into the ecosystem. Researchers are just beginning to understand their effects.
The EPA declined, after years of review, to ban the common insecticide chlorpyrifos in March 2017. We outline the controversy and the evidence it hurts developing brains.
Updated roundup of research on climate-change risks and the regions and groups most threatened by them, attempts to mitigate these risks, and adaptive efforts for coastal regions.
2015 study from the University of Iowa published in Nature Climate Change examining long-term trends in the frequency and intensity of flood events in the central United States.
2015 study from the U.S. Geological Survey examining trends in pesticide traces found in waterways across the country and effects on aquatic life and human health.
2014 and 2009 studies from U.C. Riverside, Yale and the Harvard Kennedy School on the relative merits of policies to encourage efficient use of scarce water resources.
2014 study from Cornell, the University of Arizona and the U.S. Geological Survey on the risk of multi-decade droughts in the context of ongoing climate change.
2014 review of scientific literature on potential health and environmental effects of hydraulic fracturing, or "fracking," to extract natural gas and shale oil.
2013 roundup of research on biofuels, including public attitudes, health effects, land use, environmental consequences and the long-term outlook.
2013 study on how the water supply and management strategies of four cities in the U.S. and Australia have evolved over time.